Today IIS team has published the final release of WinCache Extension 1.1 for PHP. This is the latest stable and production ready version of the extension. The v1.1 has all the features available in version 1.0 plus [other] features.

These other features include:

user cache APIs that can directly be used by PHP applications

a WinCache session handler

file change notifications (faster update time for opcode/file caches)

lock and unlock API interfaces.

He also includes a brief look at how to get it installed and working with your PHP applications, getting access to the source for the project and some places to get help with using it, on the extension itself and to report a bug that you might have found.